as的用法

1NewCollegeEnglishBookIIUnit1LoveAs用法总结NewCollegeEnglishBookIIUnit1Love1.as…as…1.表示两者在某一方面程度相同：她像孔雀一样骄傲。Sheisasproudasapeacock.其基本结构为：as+adj./adv.+as其中第一个as为副词，作“一样”解，后面接形容词或副词；第二个as为连词，作“像，如同”讲，从句常省略与主句相同的成分。NewCollegeEnglishBookIIUnit1LoveThereareasgoodfishinthesea___evercameoutofit.AthanBlikeCasDso苏格兰谚语：海里的鱼是取之不尽的。NewCollegeEnglishBookIIUnit1Love一方不如另一方时：他不如他哥哥高。Sheisnotsotallashisbrother.Sheisnotastallashisbrother.其否定式为notas/so+adj./adv.+asNewCollegeEnglishBookIIUnit1Loveas…as…二）“as…as…结构”用于表示同一个人或物不同性质的比较，意为“既……又……”。例如：Thisswimmingpoolisaswideasitislong.NewCollegeEnglishBookIIUnit1Love（三）“as…as…结构”用于表示两个人或物不同性质的比较，表示程度相同或相当，意为“……而……”。在否定句中结构是“so/as…as…”(两个形容词在类别上有相似性)Hewasashandsomeashiswifewasbeautiful他长得非常英俊，他的妻子也长得非常漂亮。Hewasasexperiencedashisbrotherwasgreen他经验丰富，而他兄弟却涉世未深。NewCollegeEnglishBookIIUnit1LoveSheisas_____ashermotherisbeautiful.AplainBcommonCdullDhumbleNewCollegeEnglishBookIIUnit1LoveHenotonlytaughtmetothink,heconvincedme,___byexampleaswordsthatitwasmymoralobligationtodosoandtoserveothers.AasmuchBmuchasCassuchDsuchasNewCollegeEnglishBookIIUnit1Love用于表示倍数若有修饰成分，如twice,threetimes,half,aquarter等，则须置于第一个as之前。例如：Yourbagistwice（theprice）asexpensiveasmine.你的袋子比我的贵一倍。NewCollegeEnglishBookIIUnit1Love2.as用作连词引导时间状语从句when，从句的动作可以与主句的动作同时发生，也可以先于主句的动作发生；while时，从句的动作为一过程，主句动作与从句动作同时进行或在从句动作过程中发生；as时，主句和从句的动作同时发生，具有延续的含义。a)Itwassnowingwhenhearrivedattheconstructionsite.b)HewaswatchingTVwhilehismotherwascooking.c)Youwillgrowwiserasyougrowolder.NewCollegeEnglishBookIIUnit1Love3.as用作连词引导原因状语从句as一般放在句首，语气较弱，较口语化；Asrainhasfallen,theairiscooler.因为下过雨，空气比较清爽。NewCollegeEnglishBookIIUnit1LoveTheworstmisfortunethatcanhappentoapersoniscausedbybreakingamirror,___itbringssevenyearsofbadluck!AwhenBasCifDthoughNewCollegeEnglishBookIIUnit1Love4.as作连词引导让步状语从句although语气稍正式些，可放在句首，也可放在句中，主句中不能再用but，但可以用yet；as所表示的语气较强，引导的让步状语从句用倒装语序；however引导让步状语从句时，它的后面可跟形容词或副词，也要用倒装语序。though句子可倒装，也可用陈述语气。倒装形式同as让步状语从句as，though1.as必须要用倒装，though可以不用，不用时用although替换Althoughit'sraining,theyarestillworkinginthefield.2.句首是实义动词，其他助动词放在主语后。如实义动词有宾语和状语，随实一起放在主语之前。Childas/thoughhewas,heknewwhatwastherightthingtodo.Tryhardashewill,heneverseemsabletodotheworksatisfactorily.NewCollegeEnglishBookIIUnit1Love4.as作连词引导让步状语从句a)Althoughheisquiteold,hestilljogseveryday.b)Strangeasitmayseem,nobodywasinjuredintheaccident.c)Howeverhardhemaytry,hewillnotattainhisgoal.NewCollegeEnglishBookIIUnit1Loveas作连词引导让步状语从句____thechainexpandednationwide,inthemid-1960s,itsoughttocutlaborcosts,reducethenumberofsuppliers,andensurethatitsfriestastedthesameateveryrestaurant.A.AsB.DuetoC.OwingtoD.WithNewCollegeEnglishBookIIUnit1Love____dullhemaybe,heiscertainlyaverysuccessfultopexecutive.A.AlthoughB.WhateverC.AsD.Howeveras作连词引导让步状语从句AdverbialclauseofconcessionMuchasIwouldhavelikedto,Icouldn’tlendhimthemoneybecauseIsimplydidn’thavethatmuchsparecash.(1999.62)AdverbialclauseofconcessionFool___Janeis,shecouldnothavedonesuchathing.(2002.58)A.whoB.asC.thatD.like状语从句__Ilikeeconomics,Ilikesociologymuchbetter.(2003.59)A.AsmuchasB.SomuchC.HowmuchD.Muchas状语从句__hewantedtogooutwithhisfriendsattheweekend,hehadtostaybehindtofinishhisassignment.(2008.55)A.MuchthoughB.MuchasC.AsmuchD.Thoughmuch状语从句___nativetoAmerica,theplantnowcanbeseenallaroundtheworld.(2002.78)A.AlthoughB.SinceC.DespiteD.Because状语从句__,healwaystrieshisbesttocompleteitontime.A.HoweverthetaskishardB.HoweverhardthetaskisC.ThoughhardthetaskisD.Thoughhardisthetask状语从句__Isympathize,Ican’treallydoverymuchtohelpthemoutofthedifficulties.A.AslongasB.AsC.WhileD.Evenas引导结果状语Hisremarkswere______annoyeverybodyatthemeeting.AsoastoBsuchastoCsuchtoDasmuchastoas引导结果状语---DoesAlanlikehamburgers?----Yes.Somuch___thatheeatsthemalmosteveryday.AforBasCtoDsoNewCollegeEnglishBookIIUnit1Love5、as作关系代词的用法A.as引导定语从句与其他词连用a)thesame...asThisisthesamebookasIreadlastweek.b)such...asIdon”tlikesuchbooksasherecommends.c)so+adj.+a/an+n.(单数)+asIamnotsostrongamanasIwas.NewCollegeEnglishBookIIUnit1LoveA.as引导定语从句与其他词连用D,用于soasto,so…asto,suchastoNewCollegeEnglishBookIIUnit1LoveB.as单独引导定语从句as单独引导定语从句时，先行词可以是一个词，也可以是一个句子或短语。例如：a)Sheislate,asisoftenthecase.b)Toshutyoureyestofacts,asmanyofyoudo,isfoolish.as引导定语从句的用法as引导非限定定语,作主语,宾语,或表语:Heisateacher,asisclearfromhismanner.Heseemstobeaforeigner,asinfactheis.ThewomanisfromBeijing,astheyknowfromheraccent.as引导的非限定语从句与which从句区别:1.as从句可放在句末,句首或句中,而Which从句不能放在句首;Heoncehelpedawoman,which(as)wasreportedinthenewspaper.Thedog,which(as)isblack,isrunningtowardthestrangeman.Asweallknow,steeldiffersfromironinthattheyhavedifferentamountsofcarbonas引导的非限定语从句与which从句区别:2.as有“正如……，正像……”（补充说明）的意思;当从句是较重要的评说时,用whichAsisknowntoall,Chinaisadevelopingcountry.John,asyouknow,isafamouswriter.Tomwasalwayslateforschool,whichmadehisteacherangry.Itrainedhardyesterday,____preventedmefromgoingtothepark.Tomwasalwayslateforschool,__madehisteacherangry.John,__youknow,isafamouswriter.__isknown,smokingisharmfultoone'shealth.A.thatB.whichC.asD.it1）as引导的定语从句可置于句首，主句之后，甚至切割一个主句；wh